Bently Nevada 3500/45 Data sheet
3500/45 Position Monitor
Datasheet
Bently Nevada Machinery Condition Monitoring
Description
The 3500/45 Position Monitor is a 4-channel instrument that
accepts input from proximity transducers, Rotary Position
Transducers (RPTs), DC Linear Variable Differential
Transformers (DC LVDTs), AC Linear Variable Differential
Transformers (AC LVDTs), and rotary potentiometers. The
monitor conditions the input and compares the conditioned
signals with user-programmable alarms.
The type of measurement and transducer input
determine which I/O modules are required. See
Transducer Types for Position Measurements on
page10., See Figures and Graphs on page12., and See
I/O Modules for AC LVDTs and Rotary Potentimeters on
page14.
You can program each channel using the 3500 Rack
Configuration Software to perform the following functions:
141537 Rev. H
l Axial (thrust) Position
l Differential Expansion
l Standard Single Ramp Differential Expansion
l Non-standard Single Ramp Differential Expansion
l Dual Ramp Differential Expansion
l Complementary Differential Expansion
l Case Expansion
l Valve Position
The monitor channels are programmed in pairs and
can perform up to two of these functions at a time. For
example, Channels 1 and 2 can perform one function
while channels 3 and 4 may perform the same or a
different function.
3500/45 Position Monitor
Datasheet 141537 Rev. H
The primary purpose of the 3500/45 Position
Monitor is to provide the following:
l Machinery protection by continuously
comparing monitored parameters
against configured alarm setpoints to
drive alarms
l Essential machine information for
operations and maintenance personnel
Each channel, depending on configuration,
typically conditions its input signal to generate
various parameters called measured
variables. You can establish alert setpoints for
each active measured variable and danger
setpoints for any two of the active measured
variables.
2/19
3500/45 Position Monitor
Datasheet 141537 Rev. H
3.94 mV/V/mm (0.10 mV/V/mil)
Specifications
Inputs
Signal Accepts from 1 to 4 signal inputs
7.7 watts, typical, using Position
I/O,
or
Rotary
Potentiometer
Valve Position
Rotary Position
Transducer (RPT)
Valve Position
or
3.15 mV/V/mm (0.08 mV/V/mil)
41 mV/degree rotation
140 mV/deg rotation,
70 mV/deg rotation or
50 mV/deg rotation
Outputs
Power
consumption
Input Impedance
8.5 watts typical, using AC LVDT
I/O
or
5.6 watts typical, using Rotary
Potentiometer I/O
1 MΩ (DC LVDT inputs)
10 kΩ (Proximitor or RPT inputs)
137 kΩ (AC LVDT inputs)
200 kΩ (Rotary Potentiometer
inputs)
Front Panel LEDs
OK LED
TX/RX LED
Bypass LED
Indicates when the 3500/45 Position
Monitor is operating properly.
Indicates when the 3500/45 Position
Monitor is communicating with other
modules in the 3500 rack.
Indicates when the 3500/45 Position
Monitor is in Bypass Mode.
Transducer Power Supply
Sensitivity
Thrust
Differential
Expansion
Ramp Differential
Expansion
Complementary
Input Differential
Expansion
DC LVDT Case
Expansion
AC LVDT Case
Expansion
AC LVDT Valve
Position
3.94 mV/μm (100 mV/mil) or
7.87 mV/μm (200 mV/mil)
0.394 mV/μm (10 mV/mil) or
0.787 mV/μm (20 mV/mil)
0.394 V/mm (10 mV/mil),
0.787 V/mm (20 mV/mil),
3.937 V/mm (100 mV/mil) or
7.874 V/mm (200 mV/mil)
0.394 V/mm (10 mV/mil),
0.787 V/mm (20 mV/mil) or
3.937 V/mm (100 mV/mil)
0.05 V/mm (1.25 V/in),
0.08 V/mm (1.90 V/in),
0.10 V/mm (2.50 V/in),
0.18 V/mm (4.50 V/in),
0.20 V/mm (5.00 V/in) or
0.22 V/mm (5.70 V/in)
28.74 mV/V/mm (0.73
mV/V/mil),
15.35 mV/V/mm (0.39 mV/V/mil)
or
9.45 mV/V/mm (0.24 mV/V/mil)
28.74 mV/V/mm (0.73
mV/V/mil)
15.35 mV/V/mm (0.39
mV/V/mil),
9.45 mV/V/mm (0.24 mV/V/mil),
10.24 mV/V/mm (0.26
mV/V/mil),
7.48 mV/V/mm (0.19 mV/V/mil),
5.51 mV/V/mm (0.14 mV/V/mil),
Proximitor or
RPT
DC LVDT +15 Vdc
AC LVDT 2.3Vrms 3400Hz sine wave
Rotary
Potentiometer
Recorder
Voltage
Compliance
(current
output)
Resolution
-24 Vdc
-12.38 Vdc
+4 to +20 mA
Values are proportional to monitor
full-scale.
The monitor provides individual
recorder values for each channel
except Ramp and CIDE.
Monitor operation is unaffected by
short circuits on recorder outputs.
0 to +12 Vdc range across load
Load resistance is 0 to 600 Ω.
0.3662 µA per bit
±0.25% error at room temperature
±0.7% error over temperature range
Update rate 100 ms or less
3/19
3500/45 Position Monitor
Datasheet 141537 Rev. H
Signal Conditioning
Specified at +25 ºC (+77 ºF) unless
otherwise noted.
Thrust and Differential Expansion
Within ±0.33% of full-scale
Accuracy
Frequency Response
Direct filter -3 dB at 1.2 Hz
Gap filter -3 dB at 0.41 Hz
Ramp Differential Expansion
Accuracy
Frequency Response
Direct filter -3 dB at 1.2 Hz
Gap filter -3 dB at 0.41 Hz
typical
±1% maximum
See Ramp Differential Expansion
Accuracy on page11.
Valve Position
Within ±0.33% of full-scale
Accuracy
Frequency Response
Direct filter -3 dB at 1.2 Hz
Gap filter -3 dB at 0.41 Hz
typical
±1% maximum
Physical
Monitor Module (Main Board)
Dimensions
(Height x Width x
Depth)
Weight 0.91 kg (2.0 lb)
I/O Modules
Dimensions
(Height x Width x
Depth)
Weight 0.20 kg (0.44 lb)
241.3 mm x 24.4 mm x 241.8
mm
(9.50 in x 0.96 in x 9.52 in)
241.3 mm x 24.4 mm x 99.1
mm
(9.50 in x 0.96 in x 3.90 in)
Rack Space Requirements
Complimentary Input Differential
Expansion (CIDE)
Within ±0.33% of full-scale
Accuracy
Frequency Response
Direct filter -3 dB at 1.2 Hz
Gap filter -3 dB at 0.41 Hz
typical
±1% maximum
Case Expansion
Within ±0.33% of full-scale
Accuracy
Frequency Response
Direct filter -3 dB at 1.2 Hz
Gap filter -3 dB at 0.41 Hz
typical
±1% maximum
Monitor Module 1 full-height front slot
I/O Modules 1 full-height rear slot
Alarms
Use the 3500 Rack Configuration
Software to set alert and danger
levels for the direct values
measured by the monitor.
Alarm Setpoints
Accuracy of
alarm setpoints
Alarms are adjustable from 0 to
100% of full-scale for each
measured value. However, when
the full-scale range exceeds the
range of the transducer, the
range of the transducer will limit
the setpoint.
Within 0.13% of the desired value
4/19
3500/45 Position Monitor
Datasheet 141537 Rev. H
Alarm Time Delays
You can program alarm delays using
the 3500 Rack Configuration Software
from one to 60 seconds in one second
intervals.
Alert
Danger
From one to 60 seconds in one
second intervals
0.1 seconds or from one to 60
seconds in 0.1 second intervals
Measured Variables
Position measurements are used for
machine protection and condition
monitoring. The 3500/45 Position
Monitor returns values for the following
measured variables depending on
configuration.
Thrust Position
Differential
expansion
Ramp Differential
Expansion
CIDE
Case expansion
Value position Direct and position
Direct
Gap
Direct
Gap
Composite
Direct
Gap
Composite
Direct
Gap
Composite
Direct and position
Environmental Limits
When used with Internal/External
Operating
Temperature
Storage
Temperature
Humidity
Termination I/O Module:
-30°C to +65°C
(-22°F to +150°F)
-40°C to +85°C
(-40°F to +185°F)
95%
Non-condensing
5/19
3500/45 Position Monitor
Datasheet 141537 Rev. H
Firmware and Software
Requirements
When adding the 3500/45 Position Monitor to
an existing 3500 system, the following firmware
and software versions or later are required:
l 3500/20 RIM Firmware rev. G
l 3500 Configuration Software 2.41
l 3500 Data Acquisition 2.20
l 3500 Operator Display 1.20
l 3500/93 Display Interface Module 135799-
01
l Firmware rev. G
l For Valve Position using RPT, you must
have 3500 Configuration Software 3.00 or
greater.
6/19
Loading...